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Dynamic response and failure mode of the twin tunnel-landslide using shaking table tests
https://orcid.org/http://orcid.org/0000-0002-6131-6960
Earthquakes are the main factor that provokes landslide deformation and tunnel damage. To study the dynamic response and failure mode of the twin tunnel-landslide, shaking table tests are conducted on tunnels crossing the sliding mass and undercrossing the sliding mass simultaneously. The results show that the tunnel crossing the sliding mass is more prone to seismic damage than the tunnel undercrossing the sliding mass. In addition to the crown and shoulder, the invert of the upper tunnel and the hillside sidewall of the lower tunnel are subjected to large pressure/tension and are also potential weak areas for tunnel lining damage caused by the earthquake-induced landslide. The differences in seismic Hilbert energy between the upper tunnel crossing the sliding mass and the lower tunnel undercrossing the sliding mass lead to their distinct seismic responses. The low-frequency components (3–8 Hz) mainly induce the seismic response of the tunnel structures, while the high-frequency components (10–15 Hz) lead to the local deformation of the landslide. The seismic failure process of the twin tunnel-landslide can be divided into no deformation, local failure, and sliding failure stages based on the marginal spectrum energy identification. The twin tunnel structure and landslide interact with each other and have synergistic deformation and cyclic action under seismic loadings. The failure mode of the twin tunnel-landslide can be described as follows: settlement and extrusion at the trailing edge, cracks and spalling of tunnel lining, sliding and pulling in the middle of the landslide, tunnel overall pushing outward with the landslide, shearing out and bulging at the leading edge.
Dynamic response and failure mode of the twin tunnel-landslide using shaking table tests
https://orcid.org/http://orcid.org/0000-0002-6131-6960
Earthquakes are the main factor that provokes landslide deformation and tunnel damage. To study the dynamic response and failure mode of the twin tunnel-landslide, shaking table tests are conducted on tunnels crossing the sliding mass and undercrossing the sliding mass simultaneously. The results show that the tunnel crossing the sliding mass is more prone to seismic damage than the tunnel undercrossing the sliding mass. In addition to the crown and shoulder, the invert of the upper tunnel and the hillside sidewall of the lower tunnel are subjected to large pressure/tension and are also potential weak areas for tunnel lining damage caused by the earthquake-induced landslide. The differences in seismic Hilbert energy between the upper tunnel crossing the sliding mass and the lower tunnel undercrossing the sliding mass lead to their distinct seismic responses. The low-frequency components (3–8 Hz) mainly induce the seismic response of the tunnel structures, while the high-frequency components (10–15 Hz) lead to the local deformation of the landslide. The seismic failure process of the twin tunnel-landslide can be divided into no deformation, local failure, and sliding failure stages based on the marginal spectrum energy identification. The twin tunnel structure and landslide interact with each other and have synergistic deformation and cyclic action under seismic loadings. The failure mode of the twin tunnel-landslide can be described as follows: settlement and extrusion at the trailing edge, cracks and spalling of tunnel lining, sliding and pulling in the middle of the landslide, tunnel overall pushing outward with the landslide, shearing out and bulging at the leading edge.
Dynamic response and failure mode of the twin tunnel-landslide using shaking table tests
https://orcid.org/http://orcid.org/0000-0002-6131-6960
Earthquakes are the main factor that provokes landslide deformation and tunnel damage. To study the dynamic response and failure mode of the twin tunnel-landslide, shaking table tests are conducted on tunnels crossing the sliding mass and undercrossing the sliding mass simultaneously. The results show that the tunnel crossing the sliding mass is more prone to seismic damage than the tunnel undercrossing the sliding mass. In addition to the crown and shoulder, the invert of the upper tunnel and the hillside sidewall of the lower tunnel are subjected to large pressure/tension and are also potential weak areas for tunnel lining damage caused by the earthquake-induced landslide. The differences in seismic Hilbert energy between the upper tunnel crossing the sliding mass and the lower tunnel undercrossing the sliding mass lead to their distinct seismic responses. The low-frequency components (3–8 Hz) mainly induce the seismic response of the tunnel structures, while the high-frequency components (10–15 Hz) lead to the local deformation of the landslide. The seismic failure process of the twin tunnel-landslide can be divided into no deformation, local failure, and sliding failure stages based on the marginal spectrum energy identification. The twin tunnel structure and landslide interact with each other and have synergistic deformation and cyclic action under seismic loadings. The failure mode of the twin tunnel-landslide can be described as follows: settlement and extrusion at the trailing edge, cracks and spalling of tunnel lining, sliding and pulling in the middle of the landslide, tunnel overall pushing outward with the landslide, shearing out and bulging at the leading edge.
Dynamic response and failure mode of the twin tunnel-landslide using shaking table tests
Acta Geotech.
Lei, Hao (author) / Qian, Jiangu (author) / Wu, Honggang (author)
Acta Geotechnica ; 18 ; 4329-4351
2023-08-01
23 pages
Article (Journal)
Electronic Resource
English
Dynamic response , Failure mode , Hilbert–Huang transform , Shaking table tests , Tunnel-landslide Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
| British Library Online Contents | 2018
| Springer Verlag | 2023